Removable dewatering device

Abstract

The removable dewatering device is adapted for use in a retention basin, and filters debris from water passing there through. The present invention has an inner filter and an outer filter. The current conventional process for cleaning a retention basin filter device of debris is time consuming and arduous. Usually, retention basins must be completely drained in order to clean the filtration devices. The present invention is removed then cleaned and maintained while the retention basin is full of water, and requires considerably less effort and expense for maintenance and cleaning.

What is claimed is new and desired to be protected by Letters Patent is set forth in the appended claims: 
     
       1. A removable dewatering device for use within a water retention basin comprising:
 an exterior filter comprising:
 a cylindrical housing member having a top end, a bottom end, an inner surface, an outer surface, and an interior space; said cylindrical housing member having a plurality of perforations extending from said outer surface to said interior space, and an aperture, near said bottom end; 
 a planar baseplate secured to said bottom end of said cylindrical housing member and extending beyond said outer surface; 
 an anchor disposed on said planar baseplate and within said interior space for stabilizing said removable dewatering device; 
 a ball valve embedded within said anchor, said ball valve having a first end, a second end, and being actuatable so as to be opened or closed; 
 an outfall pipe extending through said aperture of said cylindrical housing member and connected to said first end of said ball valve; 
 a ninety-degree bend pipe connected to said second end of said ball valve and having a distal end; 
 a gasketed coupling connected to said distal end of said ninety-degree bend pipe; 
 
 an interior filter comprising:
 a perforated pipe having a top end and a bottom end; said bottom end of said perforated pipe being releasably secured to said gasketed coupling such that said perforated pipe may be selectively removed for cleaning and accessing said exterior filter for maintenance; 
 
 
       wherein, water from said retention basin is filtered by passing into said exterior filter thereafter flowing through said interior filter for further filtering before passing out through said outfall pipe when said ball valve is opened. 
     
     
       2. The removable dewatering device of  claim 1 , wherein said outer surface of said cylindrical housing member is wrapped with a hardware cloth for further removing debris from water entering therein. 
     
     
       3. The removable dewatering device of  claim 2 , wherein said perforated pipe is wrapped with a filter cloth for removing small debris from water entering therein. 
     
     
       4. The removable dewatering device of  claim 1 , wherein said top end of said cylindrical housing member comprises upstanding aperture lugs for lifting said removable dewatering device. 
     
     
       5. The removable dewatering device of  claim 1 , wherein said cylindrical housing member is encased by a pile of downwardly sloping rock or gravel. 
     
     
       6. The removable dewatering device of  claim 5 , wherein said outfall pipe extends through said pile of downwardly sloping rock or gravel into a secondary water feature. 
     
     
       7. The removable dewatering device of  claim 1 , wherein said anchor is a layer of concrete. 
     
     
       8. The removable dewatering device of  claim 7 , wherein said ninety-degree bend pipe is partially embedded within said layer of concrete. 
     
     
       9. The removable dewatering device of  claim 1 , further comprising a cap disposed on said top end of said perforated pipe. 
     
     
       10. The removable dewatering device of  claim 9  wherein said cap includes a V-shaped bail handle for facilitating removal of said perforated pipe. 
     
     
       11. The removable dewatering device of  claim 10 , further comprising a retaining chain having an end fixedly attached to said top end of said cylindrical housing member and an opposed end extending over said cap, through said V-shaped bail handle, and releasably secured to an opposed side of said top end of said cylindrical housing member. 
     
     
       12. The removable dewatering device of  claim 1 , further comprising a valve handle having a lower end connected to said ball valve and an upper T-shaped end extending above said top end of said cylindrical housing member for opening or closing said ball valve. 
     
     
       13. The removable dewatering device of  claim 12  further comprising a pair of braces extending between said valve handle and said inner surface of said cylindrical housing member for stabilizing said valve handle and preventing warpage, breakage or bending. 
     
     
       14. A removable dewatering device for use within a retention basin comprising:
 a forty-eight inch vertically orientated perforated CMP;
 said CMP having a top end and a bottom end an inner surface, an outer surface, and an interior space, said outer surface wrapped with a one half inch hardware cloth, said wrapped CMP serving as an outer filter, said CMP welded to a one fourth inch thick steel baseplate, said baseplate extending across said bottom end and at least six inches beyond on either side of said bottom end, an aperture near said bottom end sufficient in size to receive a six inch outfall pipe and, a concrete anchor disposed on top of said steel baseplate and within said interior perimeter of said CMP at said bottom end, a chain disposed across said top end of said CMP fixedly attached on one side and releasably attached at the opposite side by a releasable binder, 
 
 a one-inch square metal tube valve handle vertically oriented within said interior space of said CMP approximate said interior wall of said CMP, said valve handle extending above said top end of said CMP at an upper end and down into said concrete anchor at a lower end, 
 a pair of braces extending between and connecting said interior wall of said CMP and said valve handle, one brace of said pair disposed near said top end of said CMP and the other brace of said pair disposed near said bottom end of said CMP, said CMP adapted for encasement in a gravel cone within said retention basin, 
 a six inch PVC ball valve connected to said lower end of said valve handle and embedded within said concrete anchor, wherein said valve handle actuates said ball valve between an open and closed position, said ball valve having a first end and a second end, said first end connected to a six inch PVC outfall pipe which extends out of said aperture in said CMP and is adapted to go out through said gravel cone into a secondary water feature, said second end connected to a six inch PVC SCH 40 90-degree bend pipe, half of said bend pipe also embedded within said anchor with a distal end extending out of said concrete anchor, 
 a six inch 40 SCH SDR PVC gasketed coupling connected to said distal end of said 90 degree PVC bend pipe, 
 a six inch SDR 35 SCH PVC pipe connected to the distal end of said 40 SCH PVC gasketed coupling, 
 a twelve inch by six inch SDR 35 PVC reducer connected to the distal end of said six inch SDR 35 PVC pipe, 
 a twelve inch SDR 35 perforated PVC pipe connected to the distal end of said reducer, said twelve inch perforated PVC pipe wrapped in 100 sieve filter cloth, said twelve inch perforated PVC pipe situated centrally in said interior space of said CMP and serving as an interior filter and extending slightly above said top end of said CMP, 
 a twelve inch SDR 35 PVC cap situated on the distal end of said twelve inch perforated pipe, a V-shaped metal bail handle attached to said cap, said chain extending over said cap and through said V-shaped handle to secure said cap and said twelve-inch perforated pipe during conditions of flooding, wherein water from said retention basin is filtered by flowing first through said gravel cone and into said hardware wrapped perforated CMP and then flowing into said filter wrapped twelve inch perforated PVC pipe where it is further filtered before passing out through said six inch PVC outfall pipe into said secondary water feature and wherein said ball valve is closed by said valve handle so that said twelve inch perforated pipe can be removed, cleaned and serviced without having to drain said retention basin.